Metal rolling oil composition

Abstract

The present invention provides a metal rolling oil composition excellent in both an emulsion stability and a plating-out property, wherein the metal rolling oil composition comprises: at least one base oil selected from the group consisting of a mineral oil, animal and vegetable fat and oil, and synthetic ester; a surfactant; and an elastomer.

The invention claimed is: 
     
       1. A coolant which is prepared by dispersing, in water, a metal rolling oil composition,
 wherein proportion of the metal rolling oil composition in the coolant is 1 to 10% by volume, 
 the average particle size of the oil component in the coolant is between 3 μm and 11 μm inclusive, 
 the metal rolling oil composition comprises: at least one base oil selected from the group consisting of a mineral oil, animal and vegetable fat and oil, and synthetic ester; a surfactant of which a molecular weight is from 2,000 to 15,000 and of which HLB is from 5 to 9; and an elastomer of which a weight-average molecular weight is between 30,000 and 6,000,000 inclusive, the elastomer being at least one thermosetting elastomer selected from the group consisting of natural rubber, urethane rubber, silicone rubber, and fluoro rubber, 
 the metal rolling oil composition contains 0.1 parts by mass or more and 10 parts by mass or less of the surfactant and 0.05 parts by mass or more and 20 parts by mass or less of the elastomer, for 100 parts by mass of the base oil. 
 
     
     
       2. The coolant which is prepared by dispersing, in water, the metal rolling oil composition according to  claim 1 ,
 wherein the metal rolling oil composition further comprises an oiliness agent. 
 
     
     
       3. The coolant which is prepared by dispersing, in water, the metal rolling oil composition according to  claim 1 ,
 wherein the metal rolling oil composition further comprises an antioxidant. 
 
     
     
       4. The coolant according to  claim 1 , wherein the surfactant is at least one selected from the group consisting of: alkane sulfonate sodium salt; sodium naphthenate soap; alkylbenzene sulfonate sodium salt; alkyltrimethylammonium salt; dialkyl dimethyl ammonium chloride; alkylpyridinium chloride; a propyleneglycol-ethyleneglycol copolymer; and a monoester or polyester prepared from at least one of a higher fatty acid, poly-fatty acid, and polycondensed hydroxy fatty acid, and at least one polyhydric alcohol selected from polyethyleneglycol, glycerin, and sorbitol. 
     
     
       5. The coolant according to  claim 2 , wherein the surfactant is at least one selected from the group consisting of: alkane sulfonate sodium salt; sodium naphthenate soap; alkylbenzene sulfonate sodium salt; alkyltrimethylammonium salt; dialkyl dimethyl ammonium chloride; alkylpyridinium chloride; a propyleneglycol-ethyleneglycol copolymer; and a monoester or polyester prepared from at least one of a higher fatty acid, poly-fatty acid, and polycondensed hydroxy fatty acid, and at least one polyhydric alcohol selected from polyethyleneglycol, glycerin, and sorbitol. 
     
     
       6. The coolant according to  claim 3 , wherein the surfactant is at least one selected from the group consisting of: alkane sulfonate sodium salt; sodium naphthenate soap; alkylbenzene sulfonate sodium salt; alkyltrimethylammonium salt; dialkyl dimethyl ammonium chloride; alkylpyridinium chloride; a propyleneglycol-ethyleneglycol copolymer; and a monoester or polyester prepared from at least one of a higher fatty acid, poly-fatty acid, and polycondensed hydroxy fatty acid, and at least one polyhydric alcohol selected from polyethyleneglycol, glycerin, and sorbitol. 
     
     
       7. The coolant according to  claim 1 , wherein the average particle size of the oil component in the coolant is between 5 μm and 9 μm inclusive. 
     
     
       8. The coolant according to  claim 2 , wherein the average particle size of the oil component in the coolant is between 5 μm and 9 μm inclusive. 
     
     
       9. The coolant according to  claim 3 , wherein the average particle size of the oil component in the coolant is between 5 μm and 9 μm inclusive.